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Nov 30, 2021 at 21:26 comment added Delio Mugnolo @PiotrHajlasz So, the different definitions of Sobolev spaces on m-m-s are diverging? In this case, I'd probably pick what works best in this context.
Nov 30, 2021 at 21:25 comment added Delio Mugnolo @PiotrHajlasz Yes, this would be my most immediate interest. In the case of finite graphs, Sobolev spaces are defined in a pretty canonical way. Infinite graphs and fractals would be the next step, I guess.
Nov 30, 2021 at 17:28 comment added Piotr Hajlasz I know that you did some work in analysis on graphs. Are you interested in Sobolev embeddings on graphs?
Nov 30, 2021 at 17:24 comment added Piotr Hajlasz There are several definitions of Sobolev spaces on metric-measure spaces. Which one are you using? There are many results about compactness of the embedding, but until I know more about what $W^{1,2}$ is, I cannot answer the question.
Nov 30, 2021 at 17:23 history edited Delio Mugnolo CC BY-SA 4.0
I have removed the question about Hilbert-Schmidt property, which it possibly ill-posed in this context.
Nov 30, 2021 at 17:21 history edited YCor CC BY-SA 4.0
formatting, changed tag
Nov 30, 2021 at 16:19 history asked Delio Mugnolo CC BY-SA 4.0